dm: scsi: Add a device pointer to scan_exec(), scsi_bus_reset()

With driver model these functions need a device pointer. Add one even
when CONFIG_DM_SCSI is not defined. This avoids having ugly conditional
function prototypes, When CONFIG_DM_SCSI is not defined we can just ignore
the pointer.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/arm/mach-omap2/sata.c

@@ -63,8 +63,10 @@ void scsi_init(void)
 	scsi_scan(1);
 }
 
-void scsi_bus_reset(void)
+int scsi_bus_reset(struct udevice *dev)
 {
 	ahci_reset((void __iomem *)DWC_AHSATA_BASE);
 	ahci_init((void __iomem *)DWC_AHSATA_BASE);
+
+	return 0;
 }

cmd/scsi.c

@@ -36,7 +36,7 @@ static int do_scsi(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 	case 2:
 		if (strncmp(argv[1], "res", 3) == 0) {
 			printf("\nReset SCSI\n");
-			scsi_bus_reset();
+			scsi_bus_reset(NULL);
 			ret = scsi_scan(1);
 			if (ret)
 				return CMD_RET_FAILURE;

drivers/ata/ahci.c

@@ -26,7 +26,9 @@
 
 static int ata_io_flush(struct ahci_uc_priv *uc_priv, u8 port);
 
+#ifndef CONFIG_DM_SCSI
 struct ahci_uc_priv *probe_ent = NULL;
+#endif
 
 #define writel_with_flush(a,b)	do { writel(a,b); readl(b); } while (0)
 
@@ -926,9 +928,14 @@ static int ata_scsiop_test_unit_ready(struct ahci_uc_priv *uc_priv,
 }
 
 
-int scsi_exec(struct scsi_cmd *pccb)
+int scsi_exec(struct udevice *dev, struct scsi_cmd *pccb)
 {
-	struct ahci_uc_priv *uc_priv = probe_ent;
+	struct ahci_uc_priv *uc_priv;
+#ifdef CONFIG_DM_SCSI
+	uc_priv = dev_get_uclass_priv(dev);
+#else
+	uc_priv = probe_ent;
+#endif
 	int ret;
 
 	switch (pccb->cmd[0]) {
@@ -1128,7 +1135,9 @@ static int ata_io_flush(struct ahci_uc_priv *uc_priv, u8 port)
 }
 
 
-__weak void scsi_bus_reset(void)
+__weak int scsi_bus_reset(struct udevice *dev)
 {
 	/*Not implement*/
+
+	return 0;
 }

drivers/scsi/sandbox_scsi.c

@@ -11,15 +11,16 @@
 #include <common.h>
 #include <scsi.h>
 
-void scsi_bus_reset(void)
+int scsi_bus_reset(struct udevice *dev)
 {
+	return 0;
 }
 
 void scsi_init(void)
 {
 }
 
-int scsi_exec(struct scsi_cmd *pccb)
+int scsi_exec(struct udevice *dev, struct scsi_cmd *pccb)
 {
 	return 0;
 }

drivers/scsi/scsi.c

@@ -151,6 +151,9 @@ static ulong scsi_read(struct blk_desc *block_dev, lbaint_t blknr,
 {
 #ifdef CONFIG_BLK
 	struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
+	struct udevice *bdev = dev->parent;
+#else
+	struct udevice *bdev = NULL;
 #endif
 	lbaint_t start, blks;
 	uintptr_t buf_addr;
@@ -195,7 +198,7 @@ static ulong scsi_read(struct blk_desc *block_dev, lbaint_t blknr,
 		debug("scsi_read_ext: startblk " LBAF
 		      ", blccnt %x buffer %" PRIXPTR "\n",
 		      start, smallblks, buf_addr);
-		if (scsi_exec(pccb) != true) {
+		if (scsi_exec(bdev, pccb)) {
 			scsi_print_error(pccb);
 			blkcnt -= blks;
 			break;
@@ -224,6 +227,9 @@ static ulong scsi_write(struct blk_desc *block_dev, lbaint_t blknr,
 {
 #ifdef CONFIG_BLK
 	struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
+	struct udevice *bdev = dev->parent;
+#else
+	struct udevice *bdev = NULL;
 #endif
 	lbaint_t start, blks;
 	uintptr_t buf_addr;
@@ -256,7 +262,7 @@ static ulong scsi_write(struct blk_desc *block_dev, lbaint_t blknr,
 		}
 		debug("%s: startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
 		      __func__, start, smallblks, buf_addr);
-		if (scsi_exec(pccb) != true) {
+		if (scsi_exec(bdev, pccb)) {
 			scsi_print_error(pccb);
 			blkcnt -= blks;
 			break;
@@ -350,8 +356,8 @@ static void scsi_ident_cpy(unsigned char *dest, unsigned char *src,
 	*dest = '\0';
 }
 
-static int scsi_read_capacity(struct scsi_cmd *pccb, lbaint_t *capacity,
-			      unsigned long *blksz)
+static int scsi_read_capacity(struct udevice *dev, struct scsi_cmd *pccb,
+			      lbaint_t *capacity, unsigned long *blksz)
 {
 	*capacity = 0;
 
@@ -362,7 +368,7 @@ static int scsi_read_capacity(struct scsi_cmd *pccb, lbaint_t *capacity,
 	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 
 	pccb->datalen = 8;
-	if (scsi_exec(pccb) != true)
+	if (scsi_exec(dev, pccb) != true)
 		return 1;
 
 	*capacity = ((lbaint_t)pccb->pdata[0] << 24) |
@@ -387,7 +393,7 @@ static int scsi_read_capacity(struct scsi_cmd *pccb, lbaint_t *capacity,
 	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 
 	pccb->datalen = 16;
-	if (scsi_exec(pccb) != true)
+	if (scsi_exec(dev, pccb) != true)
 		return 1;
 
 	*capacity = ((uint64_t)pccb->pdata[0] << 56) |
@@ -480,7 +486,8 @@ static void scsi_init_dev_desc(struct blk_desc *dev_desc, int devnum)
  *
  * Return: 0 on success, error value otherwise
  */
-static int scsi_detect_dev(int target, int lun, struct blk_desc *dev_desc)
+static int scsi_detect_dev(struct udevice *dev, int target, int lun,
+			   struct blk_desc *dev_desc)
 {
 	unsigned char perq, modi;
 	lbaint_t capacity;
@@ -492,7 +499,7 @@ static int scsi_detect_dev(int target, int lun, struct blk_desc *dev_desc)
 	pccb->pdata = (unsigned char *)&tempbuff;
 	pccb->datalen = 512;
 	scsi_setup_inquiry(pccb);
-	if (scsi_exec(pccb) != true) {
+	if (scsi_exec(dev, pccb) != true) {
 		if (pccb->contr_stat == SCSI_SEL_TIME_OUT) {
 			/*
 			  * selection timeout => assuming no
@@ -523,7 +530,7 @@ static int scsi_detect_dev(int target, int lun, struct blk_desc *dev_desc)
 
 	pccb->datalen = 0;
 	scsi_setup_test_unit_ready(pccb);
-	if (scsi_exec(pccb) != true) {
+	if (scsi_exec(dev, pccb) != true) {
 		if (dev_desc->removable) {
 			dev_desc->type = perq;
 			goto removable;
@@ -531,7 +538,7 @@ static int scsi_detect_dev(int target, int lun, struct blk_desc *dev_desc)
 		scsi_print_error(pccb);
 		return -EINVAL;
 	}
-	if (scsi_read_capacity(pccb, &capacity, &blksz)) {
+	if (scsi_read_capacity(dev, pccb, &capacity, &blksz)) {
 		scsi_print_error(pccb);
 		return -EINVAL;
 	}
@@ -561,7 +568,7 @@ static int do_scsi_scan_one(struct udevice *dev, int id, int lun, int mode)
 	 * size, number of blocks) and other parameters (ids, type, ...)
 	 */
 	scsi_init_dev_desc_priv(&bd);
-	if (scsi_detect_dev(id, lun, &bd))
+	if (scsi_detect_dev(dev, id, lun, &bd))
 		return -ENODEV;
 
 	/*
@@ -642,7 +649,7 @@ int scsi_scan(int mode)
 	scsi_max_devs = 0;
 	for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
 		for (lun = 0; lun < CONFIG_SYS_SCSI_MAX_LUN; lun++) {
-			ret = scsi_detect_dev(i, lun,
+			ret = scsi_detect_dev(NULL, i, lun,
 					      &scsi_dev_desc[scsi_max_devs]);
 			if (ret)
 				continue;

include/scsi.h

@@ -196,8 +196,8 @@ void scsi_low_level_init(int busdevfunc);
 void scsi_init(void);
 #endif
 
-int scsi_exec(struct scsi_cmd *pccb);
-void scsi_bus_reset(void);
+int scsi_exec(struct udevice *dev, struct scsi_cmd *pccb);
+int scsi_bus_reset(struct udevice *dev);
 
 /***************************************************************************
  * functions residing inside cmd_scsi.c